Granted Patent
Utility
US 4,399,532 · App. 06/292,327
Methods of and systems for monitoring a first call connection while effecting the establishment of a second call connection
Inventors:
Jamie J. Marschner, Rodney R. Maxon
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Aug 12, 1981
Inventors
Jamie J. Marschner
Rodney R. Maxon
Assignee (at issue)
Western Electric Company, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.